Connecting structure of impeller and gear shaft

Abstract

The invention relates to a connecting structure of an impeller and a gear shaft, in particular to a positioning clamping structure of the impeller. The connecting structure comprises the gear shaft and the impeller and is characterized by further comprising fastening screws. The impeller and the gear shaft are concentric, and the fastening screws enable the impeller to be in fastening connection with the gear shaft by screwing. The end face of the gear shaft is provided with a positioning hole, and the back of the impeller is provided with a positioning boss. The number of the fastening screws is more than three. The connecting structure is simple, compact and reasonable in structure, installing positions of parts can be guaranteed well by machining, the impeller and a high-speed gear can be connected firmly together only through the fastening screws, and the impeller can be positioned circumferentially and axially simultaneously. The connecting structure of the impeller and the gear shaft is low in assembling difficulty and reliable to connect, a key groove and a key are not required, force assembling is not required, and stability of a system can be improved.

Description

technical field [0001] The invention relates to a connection structure of an impeller and a gear shaft, specifically a positioning and clamping structure of the impeller to ensure the reliability of the impeller operation, and belongs to the technical field of mechanical structures. Background technique [0002] In the prior art, the connection structure between the impeller and the gear shaft of a single-stage high-speed centrifugal fan is generally keyed or keyless. The keyless structure relies on the elastic stretching and deformation of the high-speed shaft, and the deformation part recovers to compress the impeller. The impeller is driven by a motor, and a higher speed is obtained after being increased by the gear. If there is a keyed connection, due to the inconsistency between the design of the keyway and the material used for the key and the material of the impeller body, additional dynamic imbalance will be generated on the impeller and the high-speed shaft; in addi...

AI Technical Summary

Problems solved by technology

If there is a keyed connection, due to the inconsistency between the design of the keyway and the material used for the key and the material of the impeller body, additional dynamic imbalance will be generated on the impeller and the high-speed shaft; in addition, due to the design of the keyway on the impeller, the local strength of the impeller must also be considered The problem of influence; there is also a key connection that can only be positioned in the circumferential direction, and the impeller must be fixed axially

The impeller adopts a keyless connection structure design, the elastic stretching and deformation recovery of the high-speed shaft are not easy to control, and stress concentration is easy to occur after stretching; the torque transmission by the friction generated by the tension force is unreliable, and the assembly is time-consuming and labor-intensive.

Images